Question

A contractor has to finish a work in 20 days and employs 30 men on the job. If the
work is to be finished in 15 days, the number
of extramen to be employed is. ​

Answer 1

Answer:

This should be simple:

Work load = Work done

Let x=additional men to finish the job

Assuming same work rate of 8hrs per day, thus, you can equate:

(30)(20) = (15)(30+x)

x=10 men